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Proceedings Paper

Fast timing with XEUS: evaluation of different detector concepts
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Paper Abstract

With its large collecting area XEUS will be ideally suited to probe strong gravity fields around collapsed objects and to constrain the equation of state of dense matter in neutron stars. For these studies, detectors are needed which can measure 106 events/sec with high time resolution (10 μsec) and good energy resolution (ΔE = 200 - 300 eV FWHM) combined with an energy and flux independent dead time. The current baseline for a dedicated fast timing detector on XEUS is an array of 19 silicon drift detectors (SDD) operated as single photon detectors. Optionally we have studied an array of 40 x 20 SDD/DEPFET macro pixel detectors read out at a constant frame rate of 105/sec. Alternatively to these two dedicated detectors, a high time resolution mode of the Wide Field Imager (1024 x 1024 DEPFET array with 78μm x 78μm pixels) is considered here. We have simulated the expected timing performance of these detector options based on results from laboratory measurements. We have performed Monte Carlo simulations using the latest available XEUS mirror response files for Crab like sources and intensities ranging from 102 up to 4x106 events/sec. Our results are discussed in the light of the scientific requirements for fast timing as expressed in the ESA Cosmic Vision 2015-2025 plan.

Paper Details

Date Published: 13 June 2006
PDF: 8 pages
Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62661Y (13 June 2006); doi: 10.1117/12.671951
Show Author Affiliations
Eckhard Kendziorra, Eberhard Karls Univ. Tübingen, Institut für Astronomie und Astrophysik (Germany)
Michael Martin, Eberhard Karls Univ. Tübingen, Institut für Astronomie und Astrophysik (Germany)
Andrea Santangelo, Eberhard Karls Univ. Tübingen, Institut für Astronomie und Astrophysik (Germany)
Jörn Wilms, Univ. of Warwick (United Kingdom)
Didier Barret, CESR (France)
Gerry Skinner, CESR (France)
Lothar Strüder, Max-Planck-Institut für extraterrestrische Physik (Germany)
Peter Lechner, PNSensor GmbH (Germany)
Johannes Treis, Max-Planck-Institut für extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 6266:
Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray
Martin J. L. Turner; Günther Hasinger, Editor(s)

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